Plumb-level.



No. 635,564. Patented Oct. 24, I899.

' K. MARTIN.

PLUMB LEVEL.

(Application filed Apr.

(No Model.)

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RRIS Pmns co. M01254. 1'

UNITED STATES PATENT OFFICE.

KARL MARTIN, OF HOMBURG-VOR-DER-HGHE, GERMANY.

PLUM B-LEVEL.

SPECIFICATION forming part of Letters Patent No. 635,564, dated October24, 1899.

Application filed April 15, 1899. Serial No. 713,188- (N'o model.)

To all whom it may concern:

Be it known that I, KARL MARTIN, a subject'of the King of Prussia,Emperor of Ger-' many, residing at Homburg-vor-der-Hohe, in the Kingdomof Prussia, Germany, have invented certain new and useful Improvementsin Levels, (for which I have applied for a pat ent in Germany, datedSeptember 16, 1898,) of which the following is a specification.

This invention relates to an improved level; and it consists,essentially, of a magnetized indicating steel hand pivoted over ascaleand surrounded by an annular tube, which is slotted throughout itsentire length on the inner side and contains a soft-iron ball that canmove freely.

In the accompanying drawings, representing this-invention, Figure l is afront elevation, and Fig. 2 a vertical section on line 2 2 of Fig. 1.

Upon an upright board a a magnetized indicating-hand b is pivoted at 0,so as to turn easily. A scale is attached on the board a, which wouldgive in a circle or are the deviation to the horizontal in degrees,minutes, and seconds. This scale is surrounded by a tube 6, which isslotted throughout its en tire length on the inner side or side next tothe indicating-hand. Within this tube there is a soft-iron ball f, whichcan move freely, so that it always assumes the lowest position in thetube. As, however, the. indicatinghand 6 is made of magnetized steel, itwill always move with the ball, and thus indicate the position of thelatter on the scale.

What I claim, and desire to secure by Let ters Patent of the UnitedStates, is

1. A level consisting of a magnetized indicatingsteelhand which ispivoted overa scale and surrounded by an annular tube slotted throughoutits entire length on the inner side which tube containsa soft-iron ballthat can move freely, substantially as described.

2. A level consisting of a suitable casing having an annular wayarranged therein, and a scale on its face, a magnetized indicatinghandpivoted to move over said scale, and a soft-iron body freely movable insaid way and cooperating with the hand, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses.

KARL MARTIN.

Witnesses:

RICHARD GUENTHER, J EAN GRUND.

